On Thu, Aug 13, 2009 at 3:03 PM, leiz<[email protected]> wrote: > > I think tags/comments and red-eye (for whatever reason) are the only > operations that change your photos directly. I don't think it can be > turned off. Keep in mind this only changes the JPEG metadata, and > doesn't modify the image portion of the JPEG file.
Right, not the 'image portion' of the file, but the file is being changed, the date changes, the checksum changes, the size changes. There are benefits of writing metadata to the image file, however I prefer original images to be immutable. > > The IPTC fields are standard fields that many photo apps understand. > Would you rather have Picasa store tags in some format that's less > exchangeable with other apps? If Picasa is going to write to my files, IPTC is probably fine, though XMP seems to be the preferred currently. Thanks, Kent > > On Aug 13, 12:16 pm, Kent Tenney <[email protected]> wrote: >> leiz, >> >> So Picasa changes the image file on disk when >> a tag or comment is applied? >> >> I consider that presumptious, I would prefer my original files >> not be changed. >> >> It would be great if the format of the Picasa database were >> documented. >> >> If Picasa developers follow this list I'd be interested in any >> comments on the db format, and the wisdom of altering the >> image files. Is this something that can be turned off? >> >> Thanks, >> Kent >> >> >> >> On Thu, Aug 13, 2009 at 1:59 PM, leiz<[email protected]> wrote: >> >> > Picasa stores comments and tags inside JPEG files as IPTC data. For >> > instance, I took foo.jpg and added "test_comment" along with the tags >> > "testtag1" and "testtag2" When I examine the file with exiv2 [1] as >> > follows: >> >> > exiv2 -pi print foo.jpg >> >> > I get: >> >> > Iptc.Application2.Caption String 12 >> > test_caption >> > Iptc.Application2.Keywords String 8 testtag1 >> > Iptc.Application2.Keywords String 8 testtag2 >> >> > [1]http://www.exiv2.org/ >> >> > On Aug 2, 12:22 pm, ktenney <[email protected]> wrote: >> >> Howdy, >> >> >> I'm starting to use Picasa 3 for Linux. >> >> >> Before I invest lots of time into tagging and captioning, I'd like to >> >> know >> >> that information is accessible from outside Picasa. >> >> >> Is there a programming API for Picasa? >> >> Is the database format documented? >> >> Is it possible to export to some kind of text format: xml or csv? >> >> >> Thanks, >> >> Kent > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google-Labs-Picasa-for-Linux" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/Google-Labs-Picasa-for-Linux?hl=en -~----------~----~----~----~------~----~------~--~---
